Sun, 29 Jul 2007 14:30:04 +0200 moved Drule.add/del/merge_rules to Thm.add/del/merge_thms;
wenzelm [Sun, 29 Jul 2007 14:30:04 +0200] rev 24048
moved Drule.add/del/merge_rules to Thm.add/del/merge_thms; moved Drule.is_dummy_thm to Thm.is_dummy;
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